Dear Colleagues, We are pleased to share with you our new research article entitled: "Seabirds and Sotalia guianensis associations at the southern Gulf of Venezuela". The paper can be download in the following link: http://www.scielo.org.co/pdf/cal/v37n2/v37n2a6.pdf The original paper is in Spanish, but further questions can be formulated in English to the authors. ABSTRACT: Associations between seabirds and marine mammals are a common event in all seas and oceans of the world. Several authors have called these associations as commensal, opportunistic or parasitic relationships, depending on the result of such interaction effect on one or two related species. In order to describe the presence of associations among Sotalia guianensis and sea birds in the southern region of the Gulf of Venezuela, from June 2011 to June 2012, observations of groups of this cetacean and seabirds were made on mobile platforms, using the “group follow” protocol following an “Ad libitum sampling”. All sightings were geo-referenced and annotations about the occurrence or non-association with seabirds, species and number of birds present at the association were made. During the sampling period 721 sightings were recorded, of which 197 events of aggregation between seabirds and S. guianensis were registered. The resident seabird species most frequently presented at each event associated with S. guianensis were: Fregata magnificens (49%; n=98), Phalacrocorax brasilianus (29.5%; n=59) and Pelecanus occidentalis (22.5%; n=45); being Thalasseus maxima (71%; n=142) the only migratory species. During all sampling sightings was observed only one interaction between a swallow species (Riparia riparia) and Sotalia guianensis. These bird-dolphin associations were only observed when a notable congregation of fish was registered and a dolphin or a group of dolphins were performing any activity with large movements of water that allowed birds to find and locate their preys with low energy cost. Key words. Seabirds, Sotalia guianensis, Navigation channel, Gulf of Venezuela. CITATION: Espinoza-Rodríguez, N., Carrasquero, J., De Turris-Morales, K., Delgado-Ortega, G., & Barrios-Garrido, H. (2015). ASOCIACIONES ENTRE AVES MARINAS Y SOTALIA GUIANENSIS EN EL SUR DEL GOLFO DE VENEZUELA. *Caldasia*, *37*(2), 309-318. doi: http://dx.doi.org/10.15446/caldasia.v37n2.54381. Best regards HBG -- *********************************************** Hector Barrios-Garrido. PhD Candidate- Candidato a Doctor. College of Marine & Environmental Sciences James Cook University, Townsville, QLD 4811 Australia. *GTTM-GV: 18 años. **Acompañando a nuestras comunidades indígenas hacia la conservación integral. * Biólogo-Biologist. Magister en Ecologia Aplicada. Master in Applied Ecology. IUCN/SSC Marine Turtle Specialist Group Member. International Sea Turtle Society Member. Laboratorio de Ecologia General Departamento de Biologia Facultad Experimental de Ciencias La Universidad del Zulia Grupo de Trabajo en Tortugas Marinas del Golfo de Venezuela (GTTM-GV) Presidente Fundador-President (Founder) Centro de Modelado Cientifico (CMC) Eje: BioCiencias. Townsville, Queensland, Australia. alt.email: hector.barriosgarrido@my.jcu.edu.au Skype: hector.barrios.garrido NO IMPRIMAS ESTE CORREO SI NO ES NECESARIO. CUIDEMOS A LOS ÁRBOLES. CUIDEMOS EL PLANETA. VENZAMOS AL CAMBIO CLIMÁTICO. PUBLICATIONS: https://www.researchgate.net/profile/Hector_Barrios-Garrido https://scholar.google.com/citations?user=1-jYN84AAAAJ&hl=es